Random sound field in reverberation chambers

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Journal titleJournal of the Acoustical Society of America
Pages13191321; # of pages: 3
AbstractA series of experiments were performed to compare the efficiency of different dilfusing devices in producing a completely random sound field in a reverberation chamber and the ellectiveness of some of the methods for judging whether a sound field is completely random. An additional experiment was performed to compare two types of test signals, vis., warble tone and the same nominal band width of random noise. Results of these measurements indicate the general superiority of the rotating vane over other diffusing devices and superiority of random noise over warble tone in producing a smooth decay curve. One of the significant conclusions is that even when the diffusion is reasonably adequate the measured absorption coefficient of a standard sample appears to vary with the chamher absorption especially at the high frequencies.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number5347
NPARC number20358805
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Record identifierd5bfe38e-a2fd-44b3-bf2f-b81ba7fe52e4
Record created2012-07-20
Record modified2016-05-09
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